Circuit Lake » AVR

AVR Security Keypad Lock

admin — Thu, 09 Feb 2012 04:20:37 +0000

The Security Keypad Lock Project is a basic access control system based on ATtiny2313. It can be modified to protect just about anything. The “Code Lock” ability will allow the rightful user to deploy the platform to any property that requires simple password-protection.The “AVR” RISC microcontroller used ensures low costs. Possible applications may include: [...]

Simple Automatic Battery Discharge Analyzer

admin — Sat, 29 Oct 2011 01:10:27 +0000

The project allows you to analyze characteristics of unknown/junk battery especially the capacity and variation of the voltage on discharge. It is controlled with a PC via a serial port. No external power supply is required because it is powered by RS-232C signals. It uses ATmega48 as main controller for dummy load and constant current [...]

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Rechargeable Battery Capacity Tester

admin — Mon, 24 Oct 2011 03:12:53 +0000

This ATMega168-based battery tester allows you to find out the overall capacity of the rechargeable battery. It can shows how long will a battery last from the time it’s fully charged to the time that the “low battery” indicator comes on your device. It can be used to test multiple cells individually, and display [...]

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Electric Spinning Wheel

admin — Tue, 18 Oct 2011 02:11:05 +0000

The Electric Eel Wheel is a smart electric spinning wheel which helps you spinning the fiber of your choice into yarn easily instead of traditional wheel. This Electric spinner is lighter and smaller, making it easier to take your spinning with you. You can control spinning speed and its direction, forward or reverse. The electronics [...]

AVR Code Debugger

admin — Sun, 16 Oct 2011 01:19:16 +0000

AVR Code Debugger is useful tool to help you debug code without require resource in the MCU you are debugging. It only use 1 I/O pin, and is connected to a serial port from the host PC. Using a VT100 terminal to capture the output from the Debug tool, all of the debug information can [...]

AVR Data Logger with MicroSD

admin — Wed, 12 Oct 2011 01:22:39 +0000

This project shows you how to store data into microSD card in files with FAT32 format using microcontroller AVR ATmega32. The MCU receives sensor’s data through internal ADC. You can connect up to 8 different sensors to the system.In this project, Dharmani uses one channel to read temperature value from LM35 sensor and remain channels [...]

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Low Picofarad Capacitance Meter

admin — Wed, 31 Aug 2011 05:40:19 +0000

This little instrument, named as Pico C, can be used to measure capacitances down to fractions of a picofarad. It built based on ATtiny2313 microcontroller. It has range: <1 pF to 2000 pF (guaranteed); 2500 pF possible and resolution: 0.1 pF. To read the result, this low cost C meter comes with 2 lines LCD. [...]

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